Bányászat: Szénbányászat: Általában
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:24ec89a6-9c5a-442a-9e1b-3b3bf9ffba23 |
| Institution: | Open Society Archives at Central European University |
|---|---|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10891/osa:24ec89a6-9c5a-442a-9e1b-3b3bf9ffba23 |